Foundry Metallurgy — Part 2 MCQs with Explanations

$${t^{\frac{1}{2}}}$$ is the correct answer to “During metal casting of a slab, the thickness of solid formed after time 't' is proportional to”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

40 is the correct answer to “Two square shaped steel plates A and B have thickness of 4 and 8 cms respectively. They are sand cast under identical conditions. Plate A takes 10 minutes to solidify. Plate B would solidify in . . . . . . . . minutes.”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

Calendaring is the correct answer to “The operation not associated with casting is”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

√2 : 1 is the correct answer to “A vertical tapered sprue of 16 cms length is, kept full during pouring. To just avoid any aspiration, the cross-sectional areas at the centre and the bottom of the sprue must be in the ratio of”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

Only low melting point metals can be cast is the correct answer to “In hot chamber method of die casting . . . . . . . .”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

Nucleation is the correct answer to “The process of formation of new stable tiny particle of product phase in the parent phase during phase transformation process.”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

4.5 mm is the correct answer to “The machining allowances for medium section cast steel”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

Split pattern is the correct answer to “A cope and drag pattern is another form of”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

Pressed casting is the correct answer to “In which of the following methods, close fitting cores are pushed in the cavities”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

easy removal of pattern from the mould cavity is the correct answer to “Draft allowance given to patterns is for”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

620 is the correct answer to “For casting a cylindrical aluminum bloom having a length of 1000 mm and diameter of 700 mm. the approximate solidification time (in minutes) estimated using Chvorinov's rule is”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

24 is the correct answer to “The shrinkage allowance for zinc is . . . . . . . . mm.”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

grey cast iron is the correct answer to “Riser is not required for the casting of”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

Both 'a' and 'r' are true, but 'r' is not the reason for 'a' is the correct answer to “Assertion 'a' : During casting of aluminium, grain refinement can be achieved by addition of certain alloying elements. Reason 'r' : The addition of the alloying elements may result in the formation of deoxidation products or intermetallic compounds which may act as nucleation sites for grain refinement.”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

channel size is the correct answer to “In foundary practice, the fluidity of an alloy does not increase with increasing”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

semi centrifugal casting is the correct answer to “Fly wheels, track wheels and gears can be produced by”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

1 : 0.75 : 0.50 is the correct answer to “For designing a pressurised gating system in sand casting, the gating ratio should be”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

Hot strength is the correct answer to “. . . . . . . . is the strength of the sand (of mold cavity) above 100°C”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

Na is the correct answer to “Eutectic Al-Si castings are modified by”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

The melting pot is separate from die casting machine is the correct answer to “In cold chamber method of die casting . . . . . . . .”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

All of these is the correct answer to “What are the parameters that metal shrinkage depends”. This question is standard in competitive examination syllabi for Foundry Metallurgy.

P-2, Q-1, R-3, S-4 is the correct answer to “Match the casting defects in Group 1 with cause given in Group 2 . Group 1 Group 2 P. Hot tear 1. Insufficient melt superheat Q. Misrun 2. High residual stresses R. Blister 3. Improper venting S. Rat tail 4. Expansion of sand”. This question is standard in competitive examination syllabi for Foundry Metallurgy.